ASRock Z87 OC Formula Quick Installation Guide - Page 34
Chassis, Power and MOS
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Chassis, Power and MOS Fan Connectors (4-pin CHA_FAN1) (see p.1 or 2, No. 37) GND +12V CHA_FAN_SPEED FAN_SPEED_CONTROL Please connect fan cables to the fan connectors and match the black wire to the ground pin. (3-pin CHA_FAN2) (see p.1 or 2, No. 34) (3-pin CHA_FAN3) (see p.1 or 2, No. 19) (3-pin CHA_FAN4) (see p.1 or 2, No. 42) (3-pin PWR_FAN1) (see p.1 or 2, No. 41) (3-pin MOS_FAN1) (see p.1 or 2, No. 43) FAN_SPEED + 12V GND GND + 12V CHA_ FAN_SPEED GND +12V MOS_FAN_SPEED CPU Fan Connectors (4-pin CPU_FAN1) (see p.1 or 2, No. 3) (3-pin CPU_FAN2) (see p.1 or 2, No. 4) 4 3 21 GN D + 12V CPU_ FAN_SPEED FAN_SPEED_CONTROL GND +12V CPU_FAN_SPEED This motherboard provides a 4-Pin CPU fan (Quiet Fan) connector. If you plan to connect a 3-Pin CPU fan, please connect it to Pin 1-3. ATX Power Connector (24-pin ATXPWR1) (see p.1 or 2, No. 12) 32 12 24 1 13 This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX power supply, please plug it along Pin 1 and Pin 13. English